Cargo hook



March 2, 1948. DAHLANDER I 2,436,792

CARGO HOOK Filed Sept. 6, 1945 IN V EN TOR.

ATTORNEY Bgvol Patented Mar. 2, 1948 ansaiaz "CA RGO HOOK one-half to Robert 3L Fla.

Applica'tion September 6, "-1945, Serial N"oi 614, 75

' This invention relates ;to cargovh0oks n eral and more especially sto i the typ wn' safety tacklehooks.

Among the objects of the; present inventi'on,'-.it

I -10 adjacent the {bridge or crossrpiece I: so that .wlth lginner faces =4 I mam} l2 inclinetoward one "another as them-approach the :cross-piece 1, see particularly-Fig; v:6, The-=- arms 3 and v 4 oft the is aimed to provide an improved cargo :h'ookt zi -.-clevis l--1a.d:iacent 'the=esl es; l;3 ;along the bend-b.8-

which can: with facility be locked cw'hi'le carrying a load or in'loadcarryingmoisitionand which can'withfacility be lunl-ocked ior opened-Battera load has been-deposited.

wtween thei arms 3; 4 an det-he=-extensions hand, 6 aanei provided -:with =the sh oulders -l 4: and I 4":ex- 't'endingj-from-ithe v:innen opposing fiaces 42 and-143 or atheqarmss -and =4 and textensions 5 and B re- It is also anobject rofcvtheipi-esent inventionsigiflispwtively. These gShOllldBIS e14, l4 cooperate to-provide an improved s'a fety cargo hook-which will distribute the :wearing surfaces in load carrying position so "that 'Tno single ishearing point will be exposed to wearand: intloadcarrying posiith the;cross:- piece T! to -support tthe 'ghOOkr POl t1on snow: tome-{describedqwhether or: not the pin isin2'l1lhc6.

cthen words iftkie pin awe-should shear'and tion, extensive surfaceswill be reduiredito re-sd5ri-hlie kfizthe hoo 11 013 01145 l d p o -9 ceive the load carrying force.

These and other features, -.:capabilities;;and'=advantages of the invention-Willi appear Jfrom the subjoined detailxdescription of onex'specific-='emabpelfl and I releas e.=the;,=load butwill be anchored grimplace bylthe shoulders ;I4"and the cross piece'l.

The hook=:orqhook element HS= consists essen- =tially of an up-per :h-ingedlpart 1-1 having therein bodiment thereof illustratedin -the accompanying e20- the elongated-recess l-h a (crook portion 1:9; and

drawings, in which Fig. lis aside elevation: of 'therhookand clevis inclosed position; v l

I Fig. 2 is'a side -:elevationxpartly'iinasection -of the hook and scleviszintopen; position;

Fig. 3 is an' end'view'of the hookra-nd clevis'rin closed position;

Fig, 4 is an enlarged ffagm'entalsection on the line 44 'of Fig. 1';

Fig. 5 is an enlarged fragmental section onathe line 5-5 of Fig. 2;

Fig. 6 is a fragmental section on the line-6--B of Fig. 1.

The" clevis l=forming-a partof thezimproved safety cargo .hook has in- .theembodi-ment shown,

1 a bridge -or-cross-piece-.2-at-itsaupper; end,--two leave the side bars 3 and |respectivelyterminating in a very small cross-sectiomwhich, :however, corresponds substantially -to the cross-sectionof thebridge or cross-piece-l. Furthermore, see Fig. 3,-the opening-4| between-the sidebars 3 and 4 and the cross-piece 2 is-vpreiera bly arcuate, as .for instance the inner curvediarcuate face 8.

One of the features of'the present invention The extensions 5 and 6:-have.- a'

0-122 151111113 converging ain a direction fromthe showpiece 3|;but also-gthe faces 1| If. and -l2 of 1 the :en-

w aiinger: zfl -havingwa lip il. -The finger 20 in zthe present instance in cross-section is much smaller than thecross-section -of ,the crookr I 9 and the Y cross-section of 1 the-crook -:l 9 tin turn istp zef- 1:525 erablysmaller than the hinged portion- 1 'I sell dimensions designed -,to eon form to predetermined force requirements, whichtdo not consti- -,tu-te' zany-mart of thepresentinvention. Theefinr gerwzqaand lip-t 2 lgsee ;Fig-.- 6, have inclined-faces upper face 24. The angle of the inclined fac,es 22; 23--where the finger im-opposesthe enlarge- -=,-ments 9- and- -1l.0, -see F ig.3, is substantially the v sa-me and since the lower end of -thefinger :20

.alength hot. the --upper-. surf-ace of the v cross-piece p @17- betweenethe enlar ements 9;a,nd--l0,th e finger flm whemit -in lesed: posit on/ s wnzi a Figs. 1,3 and' fir -will not onlyengage the l crossl-largements -fl andalfl in order .-to'- distribute the load carrying l 'force on gthe surfaces I I I 2 and t@the:klpper-iaceiofethe crossrpieceI.

, Thei zpin t5 as r-shownmayconsist of an ordinary-bolthaving a head lfi andaawthreaded ;por-

tion 21 to receive the nut 28, the headg inathe (presentinstance-engaging fiheuouter face :of the ar m =3- anda-the nut-28 engaging the outer race of (the farm 4'; ad-jacent -toithe extensions- 5 and; 6.

I tor w -practically :at i the! intersection between the n-larms qg Aland extensions 5; Gsrespeotively. hingedwpart 'I'Mpreferably lias-shoulders; r3fleand wt constituti-ng enlargements formedtaroundsthe slot l8.

resides informing thelenlarged portionswa' and g lneclosed ;-position,= s,ee filigree-l, itxrisrdesirous;

3 that the sides 29 and 30 of the slot I8 are parallel to the face 3| of the finger 20 and furthermore, that the end faces 32 of the shoulders I9I are in alinement with the face 29 of the slot I8 and also in alinement with the faces 33 of shoulders I4 on the inner faces of the bars 3 and 4. Preferably, the outer arcuate faces 34 of the shoulders I9I as shown conform to the arcuate faces 35 of the shoulders I4 and I4 and the shoulders 36 are positioned, see Fig. 2, so that the shoulders fore the hook I6 and clevis I are assembled, the

36 engage the end faces 33 of the shoulders I4 and I4 when the hook I8 has been raised into an open position.

When the faces 3|, V

ment with the sides 29 and 30 of the elongated slot I8 in closed position of the hook as shown 32 and 33 are inaline-Q in Fig. 1, then if the load has beencarried to; the desired location and it is then desired, to, open the hook, it will only be necessary to drop the clevis Iwith its hook I3 so that the hook 'IB strikes the cargoor adjacent supporting surface at a point in the proximity of '31, when the hookportion Iii-moves up along the pin I5 of --the-clevisI in lines parallel to the face 3|, 32,

33, 29 and 30. Thereafter, if it is then desired to swing the hook portion I6 into the position shown in Fig. 2, particularly after the pin I5 engages the lower face of the'slot I8, the shoulders I9I will slide alongside of the shoulders I4 and I4, with the arcuate faces 34 engaging the- "arcuate faces 35 as shown in Fig. 2. It has been found that by the parallel arrangement of these several faces, a smooth acting hook will be provided and the action of same be effectively controlled both for opening and closing the hook out of and into the closed position shown in Fig. l 1. Furthermore, this parallel arrangement of these several faces 29, 30, 3|, 32 and 33 will also cooperate efiectively to bring the faces 22 and 23 '7 of the finger 2|] into engagement with the faces Hand I2 of th'e enlargements 9 and I respectively. 1

' While the present clevis is shown as provided 1 with a bridge 2 that is suitable for connecting the same to the link of a chain which will hoist acable, it is ofcourse obvious without departing from the spiritof the invention that the upperend of the clevis I might be threaded to 1 receive the collar of a suitable hoisting rig which maybe adapted to receivedifierent types of rigging apparatus.

It is of course also obvious that the pin I will not be positioned until after the hook portion eis positionedso that its slot I8 alines with the pin I5. Should the pin or'bolt I5 be'sheared ing with the cross-piece 'I and lip 2| to main tainthe hooked portion I6 in closed. position with 'the clevis I.

Due to the fact, see particularly Fig. 3, that the -hook portion I6 at 40 is diminished for a hinge portion I'I might either be introduced, see

Fig. 2, from the left thereof through the space between the arms 3 and 4 above the shoulders --I4 and I4, and then the hook portion dropped idown into the position shown in Fig. 2 before -inserting the pin "I5, or else the hinge portion I| brought up between the extensions 5 and 6 and rocked around until it registers with the bore of the' pin I5 to receive the pin I5. The

end faces 33 also cooperate with the shoulders 36 to limit the outward swing of the hook portion I6 into open position- Still furthermore, when the sides ofthe slots I8 are substantially parallel to the edges of the side bars 3 and 4, see Fig. 1, particularly when a line drawn through the middle of either slot I8 coincides substantially with the axis of the composite hook including the clevis I and the hook portion I6, that is, coincides substantially with the plane drawn on the line 4-4 of Fig. 1, then after the hook portion l3 has been opened into the position shown in Fig. 2, and it is allowed to swing into closed position, it will of its own accordride into the locked position shown in Fig. 1. However, after the hook portion I6 has moved into the closedposition shown inFig. 1, a lateral thrust either on the left hand edge 44 of the crook portion I9 or on the right hand edge 45' of the crook portion I9, see Fig. 1, or for that matter, a lateral thrust on the crock portion I9from any angle will not be effective to open the hook, that is, enable the lip 2| to clear the pin I5. On the other hand, when a load has been'deposlted and slackis formed in the lanyard connected to the clevis I, and the edge 31 of the crock portion I9 strikes the load after depositingthe same, then the lip 2| will readily clear th'e'crosspiece I and swing toward the position shown in Fig. 2. I

It'is obvious that various changes and modifications may be made to the details of construction without departing from the general spirit of the invention as set forth in the appended claims.

I claim: A a

1. Acargo hook comprising a clevis and a hook element, the clevis'having parallel bars, an extension for each of said bars, across-piece connecting the ends of said extensions, the hook element having an elongated slot at one end, a pin disposed at the intersection between'said arms and extensions and extending through said slot, a lip at the other end of 'said hook element engaging said cross-piece in cargo carrying position, shoulders on said clevis, shoulders on said hook'element adjacent to its slot, the sides of said slot and the end faces of the shoulders of said clevis and the end faces of the shoulders of said hook'eleme'nt beingparallel to facilitate distance equal to the distance ofmovement of '-the pin I5 in the slot I8, it is possible toassemble the clevis I and hook I6 by introducing the hinge portion I'I either up between the extensions 5 and 6 or between the arms 3 and 4 above the recess I 8.

releasing said lip from said cross-piece.

V 2. A cargo hook comprising a clevis and a hook element, the clevis having parallel bars, an extension'for each of saidbars, a cross-piece connecting the ends of said extensions, the hook element having an elongated slot at oneend, a pin Y 7 disposed at theintersection between said arms Obviously, from aclosed position, the hook and extensions and extehdingthrough said slot,

a lip at the other end of said hook element engaging said cross-piece in cargo carrying position, shoulders on said clevis, shoulders on said hook element adjacent to its slot, said hook element having a face adjacent to said lip parallel to the sides of said slot and to the end faces of the shoulders of said clevis and of the shoulders of said hook element to facilitate releasing said lip from said cross-piece.

3. A cargo hook comprising a clevis and a hook element, the clevis having side bars and extensions inclined to one another, a cross-piece at the end of said extensions, a pin at the intersection of said side bars and extensions, shoulders formed on said side bars adjacent to said pin, the hook element having an extended slot at one end to receive said pin, a finger at the other end of said hook element, a lip at the end of said finger to engage said cross-piece when said hook element is in closed position, two pairs of shoulders .on said hook element, one pair of shoulders cooperating with the shoulders of said clevis when said hook element is in closed position to supplement said pin should said pin snap in cargo carrying position, the other pair of shoulders on said hook element cooperating with the shoulders on said clevis to limit the opening position of said hook element, the sides of said slot being parallel with the end faces of the shoulders on said clevis and of the end faces of the shoulders on said hook element to facilitate movement of the hook element relative to said pin to release the lip from said cross-piece.

4. A cargo hook comprising a clevis and a hook 6 element, the clevis having side bars and extensions inclined to one another, a cross-piece at the end of said extensions, a pin at the intersection of said side bars and extensions, shoulders formed on said side bars adjacent to said pin, the hook element having an extended slot at one end to receive said pin, a finger at the other end of said hook element, a lip at the end of said finger to engage said cross-piece when said hook element is in closed position, two pairs of shoulders on said hook element, one pair of shoulders cooperating with the shoulders of said clevis when said hook element is in closed position to supplement said pin should said pin snap in cargo carrying position, the other pair of shoulders on said hook element cooperating with the shoulders on said clevis to limit the opening position of said hook element, the finger having a face adjacent to said lip parallel to the sides of said slot, also parallel to the end faces of the shoulders of said clevis and to the end faces of the shoulders of said hook element to facilitate movement of said hook element relative to said pin when moving said hook element into open position.

NOEL L. DAHLANDER.

REFERENCES CITED Name Date Hoffman Oct. 3, 1944 Number 

